烧结压力对FGH4096粉末高温合金显微组织和拉伸性能的影响  

Effect of Sintering Pressure on Microstructure and Tensile Properties of FGH4096 Powder Superalloy

作　　者：郭林飞 郑皓宇 王楚文 仝雅倩 孙德建 高阳 席俊杰[1,2] GUO Linfei;ZHENG Haoyu;WANG Chuwen;TONG Yaqian;SUN Dejian;GAO Yang;XI Junjie(School of Material Science and Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;Henan Key Laboratory of Aeronautical Materials and Application Technology,Zhengzhou University of Aeronautics,Zhengzhou 450046,China)

机构地区：[1]郑州航空工业管理学院材料学院,河南郑州450046 [2]郑州航空工业管理学院河南省航空材料与应用技术重点实验室,河南郑州450046

出　　处：《郑州航空工业管理学院学报》2023年第2期91-98,共8页Journal of Zhengzhou University of Aeronautics

基　　金：河南省科技攻关项目(202102210013);郑州航院研究生教育创新计划基金项目(2022CX58);郑州航空工业管理学院大学生创新创业训练计划(S202210485030)。

摘　　要：采用振荡热压技术和热压技术制备了粉末高温合金FGH4096,研究了烧结压力对合金微观组织和拉伸性能的影响。结果表明,随着烧结压力的增加,样品致密度增加,原始颗粒边界(PPB)趋于严重,晶粒尺寸减小,大角度晶界和孪晶界出现的概率增大,室温拉伸性能提高。振荡烧结压力的引入有助于样品致密度的提高、PPBs缺陷的抑制、晶粒尺寸的减小、室温拉伸性能的显著提升,尤其是延伸率,可由26.1%增加至35.2%,增幅达35%,样品断裂模式由沿颗粒断裂为主变为沿颗粒与穿颗粒的混合断裂。Powder metallurgy FGH4096 is prepared by oscillating hot pressing technique and hot pressing technique.The effect of sintering pressure on the microstructure and tensile property of the alloy is investigated.The results show that with the increase of sintering pressure,the sample density increases,the prior particle boundary(PPB)become more serious,the crystal size decreases,the probability of the formation of large Angle crystal boundaries and twin boundaries increases,and thus the room temperature tensile property improve.The application of oscillating sintering pressure contributes to the increase of sample density,the suppression of PPB defects,the reduction of crystal size,and the significant improvement of room temperature tensile properties,especially the elongation,which can be increased from 26.1%to 35.2%,with an increase of 35%.The sample tensile fracture mode changes from inter-particle dominant fracture to inter-particle and trans-particle mixed fracture.

关 键 词：粉末高温合金 原始颗粒边界 晶粒尺寸 拉伸性能 

分 类 号：TG13[一般工业技术—材料科学与工程]